1. Recording Software - Audio Recorder (make sure you install lame mp3 library)
2. Resampling Software - iTunes LAME
3. Editing Software Free - Audacity for mp3
5. Multi-track recording and editing Paid - ProTools
I mentioned this in a comment but I'll say it formally here as well...
"..we use a program called iTunes-LAME at the recommendation of Mosaic b/c of podcasting purposes. we use the following setting: -v -V 6 -m m -h --resample 44.1. their technicians recommended this setting for podcasting b/c it makes the playback better. the file ends up being about 1/2 the original size.""